An extruder gear pump system is presented for the final mixing step. Feeding of the base compound from the first mixing step - done in an internal mixer - with dosing of the crosslinking chemicals into an extruder / gear pump combination gives the opportunity to get a constant high quality of the compound. Together with inline-straining of the compound this saves an additional step in producing the rubber compound.

Liquid injection moulding (LIM) is a process to produce parts of liquid silicone rubber (LSR).
Typical characteristics of LSR and the injection process offers new possibilities in design, engineering and manufacturing of parts from silicone elastomeric. This paper covers the typical characteristics and applications of LSR and LIM techniques at ZORGE Industrie B.V.